Pot Size: 2.5"
Accepted Scientific Name: Mammillaria bombycina
Origin and Habitat:
Mammillaria bombycina is native to the highlands of western Mexico, particularly in the states of Jalisco and Aguascalientes. It grows on steep, rocky slopes and cliffs at elevations between 2,000 and 2,400 meters above sea level. The natural environment is semi-arid with intense sunlight, cool nights, and minimal rainfall. Plants often anchor themselves among limestone rocks or in crevices where drainage is excellent. The species has adapted to retain moisture efficiently through its dense covering of spines and fine white hairs that reflect sunlight and reduce evaporation.
Description:
Mammillaria bombycina is a small, clustering cactus that forms dense mounds up to 4 inches (10 cm) tall and 8 inches (20 cm) wide. Each stem is cylindrical, 1–2 inches (2.5–5 cm) in diameter, and densely covered with white, hair-like radial spines and longer, reddish-brown central spines. The plant produces a halo of bright pink to magenta flowers that emerge in a ring near the top of each stem, typically in late spring to early summer. The contrast between its silvery white spines and vivid blooms makes it a popular collector’s species.
Cultivation:
Zone: 9–11
Temperature: Prefers warm conditions between 15–30°C; can tolerate brief drops to 5°C if dry.
Growth Rate: Moderate; forms attractive clumps over time.
Soil: Use a coarse, well-draining mix with pumice, perlite, and gravel to prevent root rot.
Watering: Water moderately in spring and summer, allowing soil to dry between waterings; keep nearly dry in winter.
Fertilizing: Feed with a diluted cactus fertilizer every 2–3 weeks during the active growing season.
Light: Requires bright light or full sun for compact growth and flowering; protect from extreme midday heat.
Pests and Diseases: Susceptible to mealybugs and root rot in poorly drained soils; ensure good ventilation and avoid overwatering.
Propagation:
Easily propagated by removing offsets or from seed. Offsets can be detached and replanted once callused over, preferably in spring or early summer.
